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<h1 class="title">fbm.h 示例文件</h1>
<span class="subtitle">graphicsview/boxes/3rdparty/fbm.h</span>
<!-- $$$graphicsview/boxes/3rdparty/fbm.h-description -->
<div class="descr"> <a name="details"></a>
<pre class="cpp">

  <span class="comment">/*****************************************************************

    Prototypes for the fractional Brownian motion algorithm. These
    functions were originally the work of F. Kenton Musgrave.  For
    documentation of the different functions please refer to the book:
    &quot;Texturing and modeling: a procedural approach&quot;
    by David S. Ebert et. al.

  ******************************************************************/</span>

  <span class="preprocessor">#ifndef _fbm_h</span>
  <span class="preprocessor">#define _fbm_h</span>

  <span class="preprocessor">#include  &lt;math.h&gt;</span>

  <span class="preprocessor">#ifdef __cplusplus</span>
  <span class="keyword">extern</span> <span class="string">&quot;C&quot;</span> {
  <span class="preprocessor">#endif</span>

  <span class="comment">//#define TRUE    1</span>
  <span class="comment">//#define FALSE   0</span>

  <span class="keyword">typedef</span> <span class="keyword">struct</span> {
      <span class="type">double</span> x;
      <span class="type">double</span> y;
      <span class="type">double</span> z;
  } Vector;

  <span class="type">float</span> noise3(<span class="type">float</span> vec<span class="operator">[</span><span class="operator">]</span>);
  <span class="type">double</span> fBm( Vector point<span class="operator">,</span> <span class="type">double</span> H<span class="operator">,</span> <span class="type">double</span> lacunarity<span class="operator">,</span> <span class="type">double</span> octaves<span class="operator">,</span>
              <span class="type">int</span> init );
  <span class="preprocessor">#endif</span>

  <span class="preprocessor">#ifdef __cplusplus</span>
  }
  <span class="preprocessor">#endif</span>

</pre>
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<!-- @@@graphicsview/boxes/3rdparty/fbm.h -->
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